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Finding the Fourth Proportional to 391,578.57, 587,080.58 and 125,185.77

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Solution

The fourth proportional to 391,578.57, 587,080.58 and 125,185.77 is: 187,686.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,578.57 : 587,080.58 = 125,185.77 : x
  2. Step 2: Convert to fraction form
    391,578.57/587,080.58 = 125,185.77/x
  3. Step 3: Cross multiply
    391,578.57x = 587,080.58 × 125,185.77
  4. Step 4: Simplify right side
    391,578.57x = 73,494,133,833.42
  5. Step 5: Solve for x
    x = 73,494,133,833.42/391,578.57
  6. Step 6: Final answer
    x = 187,686.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.